Tantalum, UNS R05200

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Tantalum, UNS R05200
Categories:	Metal; Nonferrous Metal; Refractory Metal; Pure Element
Material Notes:	All values may vary dependent on specific design and usage Capabilities: Wire Ribbon Square Insulated Plated Some information provided by California Fine Wire.
Key Words:	ASTM B365
Vendors:	Eagle Alloys Corporation is a leading supplier of quality metals and alloys. Our staff prides itself on working fast, efficiently and courteously to get you the information you need. Call (800) 237-9012 or visit www.EagleAlloys.com. PLANSEE SE: Whether it's high temperatures, aggressive chemicals or extreme mechanical loading: PLANSEE supplies a suitable product solution in refractory metals or composite materials. As the world market leader in powder metallurgically produced high performance materials we combine outstanding materials knowledge with profound applications and technology know-how. Visit us at www.plansee.com. Click here to view all available suppliers for this material. Please click here if you are a supplier and would like information on how to add your listing to this material.
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Physical Properties	Original Value	Comments

Density	0.600 lb/in³
Vapor Pressure	6.298e-9 bar @Temperature 2351 °C
	7.488e-9 bar @Temperature 2365 °C
	4.019e-8 bar @Temperature 2487 °C
	9.82e-8 bar @Temperature 2566 °C
	1.72e-7 bar @Temperature 2615 °C
	2.44e-7 bar @Temperature 2652 °C
	3.703e-7 bar @Temperature 2675 °C

Chemical Properties	Original Value	Comments
Atomic Mass	180.9479	1995
Atomic Number	73
Thermal Neutron Cross Section	21.3 barns/atom
X-ray Absorption Edge	0.18393 Å	K
	1.06084 Å	L_I
	1.11264 Å	L_II
	1.25427 Å	L_III
Electrode Potential	4.1 V
Electronegativity	1.5	Pauling
Ionic Radius	0.680 Å	Crystal Ionic Radius for Valence +5

Mechanical Properties	Original Value	Comments
Vickers Microhardness	70 - 80	Electron beam melted, cold rolled, then annealed at 1200°C
Tensile Strength at Break	50000 psi	Annealed
	75000 psi	Stress relieved
	100000 psi	Hard
Tensile Strength, Ultimate	205 - 276 MPa	Electron beam melted, cold rolled, then annealed at 1200°C
Tensile Strength, Yield	165 - 180 MPa @Strain 0.2 %	Electron beam melted, cold rolled, then annealed at 1200°C
Elongation at Break	35 - 70 %	Electron beam melted, cold rolled, then annealed at 1200°C
Modulus of Elasticity	179 - 185 GPa	Electron beam melted, cold rolled, then annealed at 1200°C

Electrical Properties	Original Value	Comments
Electrical Resistivity	74.6 ohm-cir-mil/ft	3% tolerance on sizes below 0.02, 5% tolerance on sizes above 0.02

Thermal Properties	Original Value	Comments
CTE, linear	6.50 µm/m-°C @Temperature 20.0 °C
Specific Heat Capacity	0.138 J/g-°C @Temperature 20.0 °C
Thermal Conductivity	59.4 W/m-K
Melting Point	5234 °F
Boiling Point	5458 °C
Maximum Service Temperature, Air	500 °C	Operating Temperature

Component Elements Properties	Original Value	Comments
Tantalum, Ta	99.96 %	alternate source states 99.98%

Descriptive Properties
Magnetic	None
Temperature Coefficient of Resistance	0.0038 ohms/ohm-°C	0-100°C
Thermal EMF vs. Copper	-0.004

References for this datasheet.

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